Saint Rumbold (or Rumold, Romuold; Dutch: Rombout; French: Rombaut; Latin: Rum(w)oldus, Rumwaldus, Rumboldus, Rumbaldus; many variants overall) was an Irish or Scottish Christian missionary, although his true nationality is not known for certain.

[8] He is assumed to have worked under St. Willibrord in the Netherlands and Brabant, and also to have been a close companion of the hermit St. Gummarus,[9][1][4][10] and of the preacher monk Fredegand van Deurne, who, according to one tradition, maintained contact with St. Foillan (who was murdered in the Sonian Forest around 665).

[11] St. Rumbold's biography, written around 1100 AD by Theodoricus, prior of Sint-Truiden Abbey, caused 775 to be the traditional year of the saint's death.

[2][3][12] This would make Saint Rumbold a Hiberno-Scottish rather than an Anglo-Saxon missionary, and not a contemporary of either St. Willibrord, St. Himelin, or St.

[2] There has been some historical confusion between Rumbold of Mechelen and the infant Saint Rumwold of Buckingham, who died in 662 AD at the age of 3 days.